Why would you use a vinyl plotter for a t-shirt?
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Actually I shouldn’t say that, we’ve been known to cut rubylith on the vinyl plotter to use as screen print film positives, but not for something as small and intricate as this… True you can’t do halftone screens on a vinyl plotter, but the way this art is depicted, with inked shading, you could. If it was BIG enough.

There are some print-on-demand companies that adhere opaque colored films to fabric in place of ink. Whether a vinyl plotter is used, I don’t know. Some sort of cutting mechanism would be required, though. I’ve ordered sweatshirts with this kind of printing on them and they’re surprisingly durable.